Process for producing laminated glass



Patented June 3 1930 v Letrar naown,

rar 'Ft OF TOLEDO, OHIO, ASSIGNOR TO LIBBEY-DWENS GIASS COMPANY,

OF TOLEDO, OHIO, CORPOATION OF OHIO &a

?PROCESS FOR PRODUCING LAMINATED GLASS i Application ftled January 21, 1928. Serial No; %8388.

The present invention rela-tes to laminated y glass and to a process 'and apparatus for producing the same. An important object of the invention is to provide anjmproved process and apparatus for producing laminated glass wherein the non-brittle sheet of material to be united to the glass sheets is held against slippage during the uniting o eration.

j Another object of t e invention is to provide a processand apparatus for producing laminated .glass wherein a sheet of nonbrittle material is united to two sheets of i glass and the process contemplates the making of the laminated sheet over sized with respect to the .sheets ofjglass so that a suitable clamping means may be associated with the non-brittle sheet during the uniting of the laminations to prevent slippage of the non-brittle sheets with respect to the glass sheets.

A further object of the invention is to provide such a process and apparatus including' clamping means adapted for engagement with the non-brittle sheet during the pressing of the laminations together, said clamping means being so constructed and so mounted that the laminations may be pressed together in a suitable press and the clamping means will not :intel-tere with the unitng of the laminations but will prevent relative movement therebetween.

Other objects and 'advantages of the invention will become more apparentfiring the course of the following description when' taken in connection with the accompanying drawings.

In the drawings forming a part of this application and wherein like nume'rals are to employed to designate like parts throughout the same.

Fig. 1 is a sectonal View illustrating diagrammatically the laminations before they have been placed in contact with each other.

Fig.- 2 illustrates the laminations arranged in contact with each other and show the clamping means in operative position.

Fig. 3 is a top plan view of the laminations with the clamping means in operative position.

Fig. 4; is a diagrammatic representation of a pressing means.

Fig. 5 illustrates the laminations after they have been unitedand the trimming of the non-brittle sheet, and

Fig. 6 is a fragmentary sectional View showing a slightly modified form of construction.

In the production' of laminated glass it is customary to unite two or more sheets of glass witn one or'inore sheets of non-brittle material. Ordinarily some form of solvent, cement or other bonding medium is used to get the necessary union between the glass sheets and the non-brittle sheet. Due to the nature of the solvent, cement or the like there is a tendency for the laminations to move with respect to each other 'during the pressing operation. Slippage between the laminations is of course not desirable and it is therefore an aim of the present invention' to provide means to prevent slippage between the laminations during the joining thereof.

It is to be understood that this invention -is not limited or restricted to any particular method of joining the sheets as regards the binding m'ediums used. As an example of a 'process inFig. 1 is illustrated two sheets of glass 10 and' 11 respectively, each of which sheets is provided with a skin or coating 12 of some suitable material such The numeral 13 designates a sheet of nonbrittle material such as cellulose composition material and as shown the end 14 of this sheet extends beyond the ends or edges of the glass sheets 10 and 11.- It is also preferred that the non-brittle sheet be larger than the glass sheets so that the sides or will be seen that there can `brittle 'sheet 14, the clamp may comprise a pair of jaws 16 and 1-7 operable toward and away from each other by means of a threaded nut or the like 18. The size of the jaws and the nut 18 is such that the clamp 15 ma be arranged on the non-brittle sheet an yet ermit the assembled Sandwich to be arranged in a press' The size of the clamp of course will be dependent upon,

the thickness of the Sandwich formed by the superimposing of the sheets of glass and the sheet of non-brittle material; As shown in 'the plan View in Fig. 3 a number of clamps 15 are used in a, single Sandwich, however, this invention is not limited to the number 'of clamps used during the operation.

In assembling the laminations prior to their being united the non-brittle 'sheet is area 19 shown in Fi 3 to be present preferably around the entire glass sheet 20 so that in this way the elamps 15 may be arran ed around the Sandwich. After the Sandwich with the edges of the other laminations whereby to prevent relative movement between the various laminations.

Si ned at Toledo, in the county of Lucas` and tateof Ohio, this 19th day of January, 1928.

WILBUR F. BROWN.

may be arranged in the press 21 and suflicient pressure and heat appled to obtain a' bond between the laminations. Due to the -factthat the clamping means are arranged on the non-brittle sheet 14 in a manner that the clamp not only engages the sheet 14 but also abut the ends 22 of the lass sheets, it

4 %e no relative movement between the laminations comprsing the Sandwich and by preventing this relative movement of 'slippage it is much easier to produce satisfactory sheets of laminated glass.

After the sheet is taken from the means and the clamps removed, a other similar means 23 ma be used to trim the edges of the non-brttle sheet and this may be readily accomplished. In Fi 6 is illustrated a so-called "bullet-proo type of glass and in thisrcase both of the non-brittle sheets are such that the clam ing means 15 may be used during the uniting or pressing` operation.

It-will be seen that the clanps are so .designed that they can be used while the sheet is in the press without interfering with the pressing of the glass. In other words, there is suficent clearance both above and below the elamps when they are in operative position to allow the press to be used as is ore dinarily done.

` 'fe or consisting in assembling the lamnations, i 

